Electromagnetism 1
What are magnetic forces?
The attractive and repulsive forces between two poles.
What are electric forces?
Occur when ions create attractive and repulsive forces. Positive and negative charges.
What is gravity?
The force of attraction between two objects.
All objects with what, exert gravitational force?
Mass
Does static electricity move through a current?
No
What is electromagnetism?
Magnetic and electric forces moving together.
Magnets have two what?
Poles (N&S)
What is an example of gravity?
Apple falling off the tree.
What two things are gravity dependent on?
Mass and the distance between the objects.
What is force?
The push or pull of an object.
When the same pole comes together what happens? When two different poles come together what happens?
They repel and attract.
What two things increase the magnetic field?
Closer to the poles and stronger magnet.
The larger the object and greater the mass. The ____________ gravitational force.
Greater
The further away two objects the ____________ the gravitational force. The closer the objects the ___________ the gravitational force.
lesser, greater
This helps keep the moon in orbit around the earth.
Gravity
Electric forces have two types of chargers. What are they?
Positive and negative
You can increase the strength of an electromagnet by?
Increasing the number of coils or increasing the voltage.
Gravity _________ objects towards the center of earth.
Pulls
What is weight? What is mass?
The result of gravity pulling on an object. Mass is the amount of matter in an object.
What is net force?
The combined result of all forces acting upon an object.
What produces an electromagnet?
A current flowing through a wire is surrounded by a magnetic field.
Give three examples of an electromagnet.
Speakers, motors, generators, MRI, hard drives, etc…
What are the four forces that affect airplanes. What are they known as?
Thrust, Lift, Drag, Gravity
Aerodynamics
Jupiter is larger than Earth. Which would have the greater gravitational force? Would a person's weight on Jupiter be greater or less than on Earth?
Jupiter, Greater
What is the amount of gravity on the moon?
1.6 m/s^2